The crossing number of the circular graph C(2m+2, m). - Dengju Ma; Han Ren; Junjie Lu (Discret. Math., 2005)

The projective plane crossing numbers of circular graphs. - Dengju Ma; Han Ren (J. Syst. Sci. Complex., 2008)

Petersen Graph Decompositions of Complete Multipartite Graphs. - Jinhua Wang; Dengju Ma (Graphs Comb., 2010)

L(p, q)-labeling of a graph embeddable on the torus. - Dengju Ma (Discret. Appl. Math., 2014)

$$ lambda $$ -numbers of several classes of snarks. - Dengju Ma; Hengfeng Zhu; Jianbao He (J. Comb. Optim., 2014)

L(2, 1)-labeling of a circular graph. - Dengju Ma; Han Ren; Damei Lv (Ars Comb., 2015)

The crossing number of the strong product of two paths. - Dengju Ma (Australas. J Comb., 2017)

The orientable genus of the generalized Petersen graph P(km, m). - Dengju Ma; Han Ren (Ars Comb., 2017)

The orientable genus of the join of a cycle and a complete graph. - Dengju Ma; Han Ren (Ars Math. Contemp., 2019)

A (2k + 1)-regular graph with page-number k. - Dengju Ma (Discret. Math., 2023)

The decycling number of a planar graph covered by K4-subgraphs. - Dengju Ma; Mingyuan Ma; Han Ren (Discuss. Math. Graph Theory, 2024)